diff options
| -rw-r--r-- | passes/pmgen/ice40_dsp.cc | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/passes/pmgen/ice40_dsp.cc b/passes/pmgen/ice40_dsp.cc index 369cb211e..00794ca0d 100644 --- a/passes/pmgen/ice40_dsp.cc +++ b/passes/pmgen/ice40_dsp.cc @@ -144,14 +144,15 @@ void create_ice40_dsp(ice40_dsp_pm &pm) // SB_MAC16 Output Interface SigSpec O = st.sigO; - if (GetSize(O) == 33) { - cell->setPort("\\CO", st.sigO[32]); - O.remove(32); + int O_width = GetSize(O); + if (O_width == 33) { + log_assert(st.addAB); + cell->setPort("\\CO", O[-1]); + O.remove(O_width-1); } - else { - log_assert(GetSize(O) <= 32); + else cell->setPort("\\CO", pm.module->addWire(NEW_ID)); - } + log_assert(GetSize(O) <= 32); if (GetSize(O) < 32) O.append(pm.module->addWire(NEW_ID, 32-GetSize(O))); |